Spark
Spark is a Astro theme by Ruben winant (Free). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 74 for mobile speed and 98 for desktop speed, 100/100 for SEO and 100/100 for accessibility (mobile/desktop, 0–100).
Mobile74
Desktop98
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 74 | 98 |
| SEO | 100 | 100 |
| Accessibility | 100 | 100 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-09-13 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Spark home page
Mobile
Speed 74 · 26 points to gain
- −22.5 Largest Contentful Paint medium effort
- −3.2 Speed Index medium effort
Desktop
Speed 98 · 2 points to gain
- −2.2 Largest Contentful Paint medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Spark default demo ↗ | 74 | 100 | 100 | 98 | 100 | 100 | 2026-09-13 |
| home ↗ | 74 | 100 | 100 | 98 | 100 | 100 | 2026-09-13 |
Show this score on your site
A live badge: it always shows Spark's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/spark"><img src="https://themestested.com/badge/astro/spark.svg" alt="Spark speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.